Function run_from_args 

pub fn run_from_args<I, T>(args: I) -> Result<String, String>
where
    I: IntoIterator<Item = T>,
    T: Into<OsString> + Clone,

Parses hr-shape arguments from an iterator and returns the rendered output.

If -o/--output-file is present, this also writes the rendered output to that file.

Errors

Returns an error string if argument parsing, shaping, or requested file output fails.